READY TO WORK The CMS detector tracks the amount of energy (length of bars) deposited by different kinds of particles (color of bars) that were produced during a May 20 test of the Large Hadron Collider. Researchers collided protons at a record energy of 13 trillion electron volts. On June 3, the LHC began running continuously at this energy.
MAPPING A COSMIC LENS The strong gravity of galaxy cluster Abell 2744 magnifies (color) and elongates (gray lines) light from galaxies that lurk in the very distant universe.
M. Bradac/UCD, D. Coe/STScI
ALTERNATE UNIVERSE A neighborhood of stars packed tightly together (illustrated) might heat interstellar space enough for an orphaned planet wandering nearby to have liquid water on its surface and, therefore, potential for life.